Analog Integrated Circuit Device Data

Freescale Semiconductor

3

34017A

TERMINAL CONNECTIONS

TERMINAL CONNECTIONS

Figure 3. 34017A Terminal Connections

Table 1. 34017A Terminal Definitions

Terminal

Number

Terminal

Name

Terminal

Function

Formal

Name

Definition

1, 8

AC1, AC2

The input terminals to the full-wave diode bridge. The AC ringing signal from the

telephone line energizes the ringer through this bridge.

5

RS

The input of the threshold comparator to which diode bridge current is mirrored and

sensed through an external resistor (R3). Nominal threshold is 1.2 V. This Terminal

internally clamps at 1.5 V.

4

RI

The positive supply terminal for the oscillator, frequency divider, and output buffer

circuits.

2, 3

RO1, RO2

The tone ringer output terminals through which the sound element is driven.

7

RG

The negative terminal of the diode bridge and the negative supply terminal of the tone

generating circuitry.

6

RC

The oscillator terminal for the external resistor and capacitor which control the tone

ringer frequencies (R2, C2).

1

AC1

R01

R02

RI

AC2

RG

RC

RS

1

2

3

45

6

7

8